Change In-Memory store to EF Core Stores for IdentityServer

[YoussefWaelMohamedLotfy]

The Configuration & Operational stores should be changed to use EF Core instead of In-Memory Stores.

Tasks

• [x] Updates Configuration & Operational stores to use EF Core
• [x] Enable Consent for MVC Client
• [x] Integrate ASP.NET Core Identity with IdentityServer